weight



(No Model.) 2 Sheets-Sheet 1.

. A. 0. WRIGHT. V MACHINE FOR MAKING METAL LATHE; m No; 513,604; IPatentd dan -30: 1 s94.

(No Model.) 2 Sheets-Sheet 2.

A. 0. WRIGHT. MACHINE FOR MAKING METAL LATHS.

' Fla. 6', 1M

FFICE.

ARTHUR OCTAVIUS WRIGHT, OF BIRMINGHAM, ENGLAND.

MACHINE FOR MAKING METAL LATHS.

SPECIFICATION forming part of Letters Patent No. 513,604, dated January30, 1894.

Application filed April 27, 1893. Serial No. 472,097. (No model.) IPatented in England January 12, 1893,10-702.

To all whom it may concern.-

Be it known that I, ARTHUR Oornvrus WRIGHT, manufacturer, a subject ofthe Queen of Great Britain, residing at 39 St. Johns Road, Birmingham,in the county of WVarwick, England, have invented certain new and usefulImprovements in the Manufacture of Metal Laths for Use in the Formationof Ceilings, Roofs, Partitions, and other such Purposes, of which thefollowing is a specification.

The invention has been patented in England, No. 702, dated January 12,1893.

My invention has for its object improvements in the manufacture of metallaths for use in the formation of fire resisting oeilin gs, roofs, andpartitions of dwellings by which I manufacture such laths of greatstrength, rigidity and grooved so as to readily receive and retain theplastic material and which I effect in an exceedingly cheap and easymanner with but very little hand labor or supervlslon. I may also curvemy laths at the same operation into segments of any required radius.

In order that my invention may be clearly understood and more easilycarried into practwo I have appended hereunto a sheet of drawings uponwhich I have fully illustrated the nature of my said improvements.

Figure 1., is an elevation showing a portion of the metal lath as outready for being grooved by the machine. Fig. 2., is an elevation of asimilar piece of lath after being grooved. Fig. 3., is a plan of themachine. Fig. 4., is a side elevation of the machine. Fig. 5., is anenlarged vertical sectional elevation of the first process of themachine. Fig. 6., is an enlarged vertical sectional elevation of thesecond process of the machine. Fig. 7., shows an enlarged verticalsectional elevation of the third process. Fig. 8., is an enlargedvertical sectional elevation of the means for drawing the lath throughthe machine. Fig. 9., is a view of a portion of a plaster partition theplaster being broken away to show one of the various uses to which thethree laths may be put.

For the double purpose of retaining the plaster from falling fromthelaths and for groove.

7 strengthening the lath a dovetail groove is formed, in carrying whichinto effect I. take the lath of metal A prepared with the toothed edgesa and a as shown at Fig. 1 which is then inserted between the pair ofrolls B and B Figs. 3 and 5 and operated upon so as to form the groove Ea certain depth after which it passes through the second pair of rolls Fand F Figs. 3 and 7 which increases the depth of the groove E to therequired extent. The lath then passes through guides h and h and betweenthe vertical rollers K and K which are shaped with the projecting edges10 so as to act upon the neck of the groove and thus convert the grooveinto that of a dovetail shape which is particularly so shaped as toretain the plastic material which'enters the neck 6' of the groove E andfills the The lath is kept from rising at this point by the roller 0which is fixed above it but which for convenience is not shown in Fig.3. The rolls M and M are provided for drawing the lath through beingspecially shaped so that they do not interfere withthe shape of thegroove but simply draw out the lath.

In case of straight laths a guide D is provided at the exit throughwhich the laths pass; but in cases where I require my laths to be curvedI fix a guide N at the exit of the last rolls which guide is curved inshape to the extent required thus causing the laths to curl up as theyleave the rolls. Of course I may vary the shape of my groove by alteringthe shape of my rolls as I may alter the number of rolls and theirposition without departing from the nature of my said invention.

What I claim, then, is

1. In comb nation, the rollers for forming the groove in the lath orother material, leaving laterally projecting flanges on each side ofsaid groove, the rollers arranged to act below the said flanges andagainst the projecting portion of the metal forming the groove, saidrollers having inclined faces to dovetail said grooved portion, and theroller 0 above the dovetailing rollers substantially as described.

2. In combination, the rollers for forming the groove in the lath andthe means for doveroo tailing said grooved portions consisting of therollers K, K, arranged at right angles to the grooving rollers andhaving projections 71:, k with inclined faces leaving dove-tailed openings between them, substantially as described.

3. In combination, the rollers for forming the grooves, the dove-tailingrollers arranged at right angles thereto and having the conicalprojections k, k and the roller 0 above the dove-tailing rollers,substantially as de- 10 scribed.

In testimony that I claim the foregoing as my own I affix my name in thepresence of two witnesses.

ARTHUR OOTAVIUS WRIGHT.

Witnesses:

LEWIS W. GooLD, GEORGE WATHEN.

